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Bluetooth: add nokia driver
This adds a driver for the Nokia H4+ protocol, which is used at least on the Nokia N9, N900 & N950. Signed-off-by: Sebastian Reichel <sre@kernel.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Sebastian Reichel
Marcel Holtmann
parent
1286be270e
commit
7bb318680e
@ -86,6 +86,18 @@ config BT_HCIUART_H4
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Say Y here to compile support for HCI UART (H4) protocol.
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config BT_HCIUART_NOKIA
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tristate "UART Nokia H4+ protocol support"
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depends on BT_HCIUART
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depends on SERIAL_DEV_BUS
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depends on PM
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help
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Nokia H4+ is serial protocol for communication between Bluetooth
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device and host. This protocol is required for Bluetooth devices
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with UART interface in Nokia devices.
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Say Y here to compile support for Nokia's H4+ protocol.
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config BT_HCIUART_BCSP
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bool "BCSP protocol support"
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depends on BT_HCIUART
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@ -25,6 +25,8 @@ obj-$(CONFIG_BT_BCM) += btbcm.o
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obj-$(CONFIG_BT_RTL) += btrtl.o
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obj-$(CONFIG_BT_QCA) += btqca.o
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obj-$(CONFIG_BT_HCIUART_NOKIA) += hci_nokia.o
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btmrvl-y := btmrvl_main.o
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btmrvl-$(CONFIG_DEBUG_FS) += btmrvl_debugfs.o
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820
drivers/bluetooth/hci_nokia.c
Normal file
820
drivers/bluetooth/hci_nokia.c
Normal file
@ -0,0 +1,820 @@
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/*
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* Bluetooth HCI UART H4 driver with Nokia Extensions AKA Nokia H4+
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*
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* Copyright (C) 2015 Marcel Holtmann <marcel@holtmann.org>
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* Copyright (C) 2015-2017 Sebastian Reichel <sre@kernel.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/errno.h>
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#include <linux/firmware.h>
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#include <linux/gpio/consumer.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/pm_runtime.h>
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#include <linux/serdev.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/unaligned/le_struct.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include "hci_uart.h"
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#include "btbcm.h"
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#define NOKIA_ID_BCM2048 0x04
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#define NOKIA_ID_TI1271 0x31
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#define FIRMWARE_BCM2048 "nokia/bcmfw.bin"
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#define FIRMWARE_TI1271 "nokia/ti1273.bin"
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#define HCI_NOKIA_NEG_PKT 0x06
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#define HCI_NOKIA_ALIVE_PKT 0x07
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#define HCI_NOKIA_RADIO_PKT 0x08
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#define HCI_NOKIA_NEG_HDR_SIZE 1
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#define HCI_NOKIA_MAX_NEG_SIZE 255
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#define HCI_NOKIA_ALIVE_HDR_SIZE 1
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#define HCI_NOKIA_MAX_ALIVE_SIZE 255
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#define HCI_NOKIA_RADIO_HDR_SIZE 2
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#define HCI_NOKIA_MAX_RADIO_SIZE 255
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#define NOKIA_PROTO_PKT 0x44
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#define NOKIA_PROTO_BYTE 0x4c
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#define NOKIA_NEG_REQ 0x00
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#define NOKIA_NEG_ACK 0x20
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#define NOKIA_NEG_NAK 0x40
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#define H4_TYPE_SIZE 1
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#define NOKIA_RECV_ALIVE \
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.type = HCI_NOKIA_ALIVE_PKT, \
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.hlen = HCI_NOKIA_ALIVE_HDR_SIZE, \
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.loff = 0, \
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.lsize = 1, \
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.maxlen = HCI_NOKIA_MAX_ALIVE_SIZE \
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#define NOKIA_RECV_NEG \
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.type = HCI_NOKIA_NEG_PKT, \
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.hlen = HCI_NOKIA_NEG_HDR_SIZE, \
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.loff = 0, \
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.lsize = 1, \
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.maxlen = HCI_NOKIA_MAX_NEG_SIZE \
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#define NOKIA_RECV_RADIO \
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.type = HCI_NOKIA_RADIO_PKT, \
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.hlen = HCI_NOKIA_RADIO_HDR_SIZE, \
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.loff = 1, \
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.lsize = 1, \
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.maxlen = HCI_NOKIA_MAX_RADIO_SIZE \
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struct hci_nokia_neg_hdr {
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u8 dlen;
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} __packed;
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struct hci_nokia_neg_cmd {
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u8 ack;
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u16 baud;
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u16 unused1;
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u8 proto;
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u16 sys_clk;
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u16 unused2;
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} __packed;
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#define NOKIA_ALIVE_REQ 0x55
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#define NOKIA_ALIVE_RESP 0xcc
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struct hci_nokia_alive_hdr {
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u8 dlen;
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} __packed;
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struct hci_nokia_alive_pkt {
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u8 mid;
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u8 unused;
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} __packed;
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struct hci_nokia_neg_evt {
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u8 ack;
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u16 baud;
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u16 unused1;
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u8 proto;
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u16 sys_clk;
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u16 unused2;
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u8 man_id;
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u8 ver_id;
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} __packed;
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#define MAX_BAUD_RATE 3692300
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#define SETUP_BAUD_RATE 921600
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#define INIT_BAUD_RATE 120000
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struct hci_nokia_radio_hdr {
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u8 evt;
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u8 dlen;
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} __packed;
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struct nokia_bt_dev {
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struct hci_uart hu;
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struct serdev_device *serdev;
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struct gpio_desc *reset;
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struct gpio_desc *wakeup_host;
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struct gpio_desc *wakeup_bt;
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unsigned long sysclk_speed;
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int wake_irq;
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struct sk_buff *rx_skb;
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struct sk_buff_head txq;
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bdaddr_t bdaddr;
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int init_error;
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struct completion init_completion;
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u8 man_id;
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u8 ver_id;
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bool initialized;
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bool tx_enabled;
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bool rx_enabled;
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};
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static int nokia_enqueue(struct hci_uart *hu, struct sk_buff *skb);
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static void nokia_flow_control(struct serdev_device *serdev, bool enable)
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{
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if (enable) {
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serdev_device_set_rts(serdev, true);
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serdev_device_set_flow_control(serdev, true);
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} else {
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serdev_device_set_flow_control(serdev, false);
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serdev_device_set_rts(serdev, false);
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}
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}
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static irqreturn_t wakeup_handler(int irq, void *data)
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{
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struct nokia_bt_dev *btdev = data;
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struct device *dev = &btdev->serdev->dev;
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int wake_state = gpiod_get_value(btdev->wakeup_host);
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if (btdev->rx_enabled == wake_state)
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return IRQ_HANDLED;
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if (wake_state)
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pm_runtime_get(dev);
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else
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pm_runtime_put(dev);
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btdev->rx_enabled = wake_state;
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return IRQ_HANDLED;
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}
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static int nokia_reset(struct hci_uart *hu)
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{
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struct nokia_bt_dev *btdev = hu->priv;
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struct device *dev = &btdev->serdev->dev;
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int err;
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/* reset routine */
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gpiod_set_value_cansleep(btdev->reset, 1);
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gpiod_set_value_cansleep(btdev->wakeup_bt, 1);
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msleep(100);
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/* safety check */
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err = gpiod_get_value_cansleep(btdev->wakeup_host);
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if (err == 1) {
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dev_err(dev, "reset: host wakeup not low!");
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return -EPROTO;
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}
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/* flush queue */
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serdev_device_write_flush(btdev->serdev);
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/* init uart */
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nokia_flow_control(btdev->serdev, false);
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serdev_device_set_baudrate(btdev->serdev, INIT_BAUD_RATE);
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gpiod_set_value_cansleep(btdev->reset, 0);
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/* wait for cts */
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err = serdev_device_wait_for_cts(btdev->serdev, true, 200);
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if (err < 0) {
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dev_err(dev, "CTS not received: %d", err);
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return err;
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}
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nokia_flow_control(btdev->serdev, true);
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return 0;
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}
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static int nokia_send_alive_packet(struct hci_uart *hu)
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{
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struct nokia_bt_dev *btdev = hu->priv;
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struct device *dev = &btdev->serdev->dev;
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struct hci_nokia_alive_hdr *hdr;
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struct hci_nokia_alive_pkt *pkt;
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struct sk_buff *skb;
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int len;
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init_completion(&btdev->init_completion);
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len = H4_TYPE_SIZE + sizeof(*hdr) + sizeof(*pkt);
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skb = bt_skb_alloc(len, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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hci_skb_pkt_type(skb) = HCI_NOKIA_ALIVE_PKT;
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memset(skb->data, 0x00, len);
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hdr = (struct hci_nokia_alive_hdr *)skb_put(skb, sizeof(*hdr));
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hdr->dlen = sizeof(*pkt);
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pkt = (struct hci_nokia_alive_pkt *)skb_put(skb, sizeof(*pkt));
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pkt->mid = NOKIA_ALIVE_REQ;
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nokia_enqueue(hu, skb);
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hci_uart_tx_wakeup(hu);
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dev_dbg(dev, "Alive sent");
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if (!wait_for_completion_interruptible_timeout(&btdev->init_completion,
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msecs_to_jiffies(1000))) {
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return -ETIMEDOUT;
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}
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if (btdev->init_error < 0)
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return btdev->init_error;
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return 0;
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}
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static int nokia_send_negotiation(struct hci_uart *hu)
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{
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struct nokia_bt_dev *btdev = hu->priv;
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struct device *dev = &btdev->serdev->dev;
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struct hci_nokia_neg_cmd *neg_cmd;
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struct hci_nokia_neg_hdr *neg_hdr;
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struct sk_buff *skb;
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int len, err;
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u16 baud = DIV_ROUND_CLOSEST(btdev->sysclk_speed * 10, SETUP_BAUD_RATE);
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int sysclk = btdev->sysclk_speed / 1000;
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len = H4_TYPE_SIZE + sizeof(*neg_hdr) + sizeof(*neg_cmd);
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skb = bt_skb_alloc(len, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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hci_skb_pkt_type(skb) = HCI_NOKIA_NEG_PKT;
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neg_hdr = (struct hci_nokia_neg_hdr *)skb_put(skb, sizeof(*neg_hdr));
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neg_hdr->dlen = sizeof(*neg_cmd);
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neg_cmd = (struct hci_nokia_neg_cmd *)skb_put(skb, sizeof(*neg_cmd));
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neg_cmd->ack = NOKIA_NEG_REQ;
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neg_cmd->baud = cpu_to_le16(baud);
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neg_cmd->unused1 = 0x0000;
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neg_cmd->proto = NOKIA_PROTO_BYTE;
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neg_cmd->sys_clk = cpu_to_le16(sysclk);
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neg_cmd->unused2 = 0x0000;
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btdev->init_error = 0;
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init_completion(&btdev->init_completion);
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nokia_enqueue(hu, skb);
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hci_uart_tx_wakeup(hu);
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dev_dbg(dev, "Negotiation sent");
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if (!wait_for_completion_interruptible_timeout(&btdev->init_completion,
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msecs_to_jiffies(10000))) {
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return -ETIMEDOUT;
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}
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if (btdev->init_error < 0)
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return btdev->init_error;
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/* Change to previously negotiated speed. Flow Control
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* is disabled until bluetooth adapter is ready to avoid
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* broken bytes being received.
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*/
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nokia_flow_control(btdev->serdev, false);
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serdev_device_set_baudrate(btdev->serdev, SETUP_BAUD_RATE);
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err = serdev_device_wait_for_cts(btdev->serdev, true, 200);
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if (err < 0) {
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dev_err(dev, "CTS not received: %d", err);
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return err;
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}
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nokia_flow_control(btdev->serdev, true);
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dev_dbg(dev, "Negotiation successful");
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return 0;
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}
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static int nokia_setup_fw(struct hci_uart *hu)
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{
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struct nokia_bt_dev *btdev = hu->priv;
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struct device *dev = &btdev->serdev->dev;
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const char *fwname;
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const struct firmware *fw;
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const u8 *fw_ptr;
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size_t fw_size;
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int err;
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dev_dbg(dev, "setup firmware");
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if (btdev->man_id == NOKIA_ID_BCM2048) {
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fwname = FIRMWARE_BCM2048;
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} else if (btdev->man_id == NOKIA_ID_TI1271) {
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fwname = FIRMWARE_TI1271;
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} else {
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dev_err(dev, "Unsupported bluetooth device!");
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return -ENODEV;
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}
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err = request_firmware(&fw, fwname, dev);
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if (err < 0) {
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dev_err(dev, "%s: Failed to load Nokia firmware file (%d)",
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hu->hdev->name, err);
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return err;
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}
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fw_ptr = fw->data;
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fw_size = fw->size;
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while (fw_size >= 4) {
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u16 pkt_size = get_unaligned_le16(fw_ptr);
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u8 pkt_type = fw_ptr[2];
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const struct hci_command_hdr *cmd;
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u16 opcode;
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struct sk_buff *skb;
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switch (pkt_type) {
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case HCI_COMMAND_PKT:
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cmd = (struct hci_command_hdr *)(fw_ptr + 3);
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opcode = le16_to_cpu(cmd->opcode);
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skb = __hci_cmd_sync(hu->hdev, opcode, cmd->plen,
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fw_ptr + 3 + HCI_COMMAND_HDR_SIZE,
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HCI_INIT_TIMEOUT);
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if (IS_ERR(skb)) {
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err = PTR_ERR(skb);
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dev_err(dev, "%s: FW command %04x failed (%d)",
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hu->hdev->name, opcode, err);
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goto done;
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}
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kfree_skb(skb);
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break;
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case HCI_NOKIA_RADIO_PKT:
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case HCI_NOKIA_NEG_PKT:
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case HCI_NOKIA_ALIVE_PKT:
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break;
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}
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fw_ptr += pkt_size + 2;
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fw_size -= pkt_size + 2;
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}
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done:
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release_firmware(fw);
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return err;
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}
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static int nokia_setup(struct hci_uart *hu)
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{
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struct nokia_bt_dev *btdev = hu->priv;
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struct device *dev = &btdev->serdev->dev;
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int err;
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btdev->initialized = false;
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nokia_flow_control(btdev->serdev, false);
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pm_runtime_get_sync(dev);
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if (btdev->tx_enabled) {
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gpiod_set_value_cansleep(btdev->wakeup_bt, 0);
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pm_runtime_put(&btdev->serdev->dev);
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btdev->tx_enabled = false;
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}
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dev_dbg(dev, "protocol setup");
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/* 0. reset connection */
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err = nokia_reset(hu);
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if (err < 0) {
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dev_err(dev, "Reset failed: %d", err);
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goto out;
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}
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/* 1. negotiate speed etc */
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err = nokia_send_negotiation(hu);
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if (err < 0) {
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dev_err(dev, "Negotiation failed: %d", err);
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goto out;
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}
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/* 2. verify correct setup using alive packet */
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err = nokia_send_alive_packet(hu);
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if (err < 0) {
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dev_err(dev, "Alive check failed: %d", err);
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goto out;
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}
|
||||
|
||||
/* 3. send firmware */
|
||||
err = nokia_setup_fw(hu);
|
||||
if (err < 0) {
|
||||
dev_err(dev, "Could not setup FW: %d", err);
|
||||
goto out;
|
||||
}
|
||||
|
||||
nokia_flow_control(btdev->serdev, false);
|
||||
serdev_device_set_baudrate(btdev->serdev, MAX_BAUD_RATE);
|
||||
nokia_flow_control(btdev->serdev, true);
|
||||
|
||||
if (btdev->man_id == NOKIA_ID_BCM2048) {
|
||||
hu->hdev->set_bdaddr = btbcm_set_bdaddr;
|
||||
set_bit(HCI_QUIRK_INVALID_BDADDR, &hu->hdev->quirks);
|
||||
dev_dbg(dev, "bcm2048 has invalid bluetooth address!");
|
||||
}
|
||||
|
||||
dev_dbg(dev, "protocol setup done!");
|
||||
|
||||
gpiod_set_value_cansleep(btdev->wakeup_bt, 0);
|
||||
pm_runtime_put(dev);
|
||||
btdev->tx_enabled = false;
|
||||
btdev->initialized = true;
|
||||
|
||||
return 0;
|
||||
out:
|
||||
pm_runtime_put(dev);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int nokia_open(struct hci_uart *hu)
|
||||
{
|
||||
struct device *dev = &hu->serdev->dev;
|
||||
|
||||
dev_dbg(dev, "protocol open");
|
||||
|
||||
serdev_device_open(hu->serdev);
|
||||
|
||||
pm_runtime_enable(dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nokia_flush(struct hci_uart *hu)
|
||||
{
|
||||
struct nokia_bt_dev *btdev = hu->priv;
|
||||
|
||||
dev_dbg(&btdev->serdev->dev, "flush device");
|
||||
|
||||
skb_queue_purge(&btdev->txq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nokia_close(struct hci_uart *hu)
|
||||
{
|
||||
struct nokia_bt_dev *btdev = hu->priv;
|
||||
struct device *dev = &btdev->serdev->dev;
|
||||
|
||||
dev_dbg(dev, "close device");
|
||||
|
||||
btdev->initialized = false;
|
||||
|
||||
skb_queue_purge(&btdev->txq);
|
||||
|
||||
kfree_skb(btdev->rx_skb);
|
||||
|
||||
/* disable module */
|
||||
gpiod_set_value(btdev->reset, 1);
|
||||
gpiod_set_value(btdev->wakeup_bt, 0);
|
||||
|
||||
pm_runtime_disable(&btdev->serdev->dev);
|
||||
serdev_device_close(btdev->serdev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Enqueue frame for transmittion (padding, crc, etc) */
|
||||
static int nokia_enqueue(struct hci_uart *hu, struct sk_buff *skb)
|
||||
{
|
||||
struct nokia_bt_dev *btdev = hu->priv;
|
||||
int err;
|
||||
|
||||
/* Prepend skb with frame type */
|
||||
memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
|
||||
|
||||
/* Packets must be word aligned */
|
||||
if (skb->len % 2) {
|
||||
err = skb_pad(skb, 1);
|
||||
if (err)
|
||||
return err;
|
||||
*skb_put(skb, 1) = 0x00;
|
||||
}
|
||||
|
||||
skb_queue_tail(&btdev->txq, skb);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nokia_recv_negotiation_packet(struct hci_dev *hdev,
|
||||
struct sk_buff *skb)
|
||||
{
|
||||
struct hci_uart *hu = hci_get_drvdata(hdev);
|
||||
struct nokia_bt_dev *btdev = hu->priv;
|
||||
struct device *dev = &btdev->serdev->dev;
|
||||
struct hci_nokia_neg_hdr *hdr;
|
||||
struct hci_nokia_neg_evt *evt;
|
||||
int ret = 0;
|
||||
|
||||
hdr = (struct hci_nokia_neg_hdr *)skb->data;
|
||||
if (hdr->dlen != sizeof(*evt)) {
|
||||
btdev->init_error = -EIO;
|
||||
ret = -EIO;
|
||||
goto finish_neg;
|
||||
}
|
||||
|
||||
evt = (struct hci_nokia_neg_evt *)skb_pull(skb, sizeof(*hdr));
|
||||
|
||||
if (evt->ack != NOKIA_NEG_ACK) {
|
||||
dev_err(dev, "Negotiation received: wrong reply");
|
||||
btdev->init_error = -EINVAL;
|
||||
ret = -EINVAL;
|
||||
goto finish_neg;
|
||||
}
|
||||
|
||||
btdev->man_id = evt->man_id;
|
||||
btdev->ver_id = evt->ver_id;
|
||||
|
||||
dev_dbg(dev, "Negotiation received: baud=%u:clk=%u:manu=%u:vers=%u",
|
||||
evt->baud, evt->sys_clk, evt->man_id, evt->ver_id);
|
||||
|
||||
finish_neg:
|
||||
complete(&btdev->init_completion);
|
||||
kfree_skb(skb);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int nokia_recv_alive_packet(struct hci_dev *hdev, struct sk_buff *skb)
|
||||
{
|
||||
struct hci_uart *hu = hci_get_drvdata(hdev);
|
||||
struct nokia_bt_dev *btdev = hu->priv;
|
||||
struct device *dev = &btdev->serdev->dev;
|
||||
struct hci_nokia_alive_hdr *hdr;
|
||||
struct hci_nokia_alive_pkt *pkt;
|
||||
int ret = 0;
|
||||
|
||||
hdr = (struct hci_nokia_alive_hdr *)skb->data;
|
||||
if (hdr->dlen != sizeof(*pkt)) {
|
||||
dev_err(dev, "Corrupted alive message");
|
||||
btdev->init_error = -EIO;
|
||||
ret = -EIO;
|
||||
goto finish_alive;
|
||||
}
|
||||
|
||||
pkt = (struct hci_nokia_alive_pkt *)skb_pull(skb, sizeof(*hdr));
|
||||
|
||||
if (pkt->mid != NOKIA_ALIVE_RESP) {
|
||||
dev_err(dev, "Alive received: invalid response: 0x%02x!",
|
||||
pkt->mid);
|
||||
btdev->init_error = -EINVAL;
|
||||
ret = -EINVAL;
|
||||
goto finish_alive;
|
||||
}
|
||||
|
||||
dev_dbg(dev, "Alive received");
|
||||
|
||||
finish_alive:
|
||||
complete(&btdev->init_completion);
|
||||
kfree_skb(skb);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int nokia_recv_radio(struct hci_dev *hdev, struct sk_buff *skb)
|
||||
{
|
||||
/* Packets received on the dedicated radio channel are
|
||||
* HCI events and so feed them back into the core.
|
||||
*/
|
||||
hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
|
||||
return hci_recv_frame(hdev, skb);
|
||||
}
|
||||
|
||||
/* Recv data */
|
||||
static const struct h4_recv_pkt nokia_recv_pkts[] = {
|
||||
{ H4_RECV_ACL, .recv = hci_recv_frame },
|
||||
{ H4_RECV_SCO, .recv = hci_recv_frame },
|
||||
{ H4_RECV_EVENT, .recv = hci_recv_frame },
|
||||
{ NOKIA_RECV_ALIVE, .recv = nokia_recv_alive_packet },
|
||||
{ NOKIA_RECV_NEG, .recv = nokia_recv_negotiation_packet },
|
||||
{ NOKIA_RECV_RADIO, .recv = nokia_recv_radio },
|
||||
};
|
||||
|
||||
static int nokia_recv(struct hci_uart *hu, const void *data, int count)
|
||||
{
|
||||
struct nokia_bt_dev *btdev = hu->priv;
|
||||
struct device *dev = &btdev->serdev->dev;
|
||||
int err;
|
||||
|
||||
if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
|
||||
return -EUNATCH;
|
||||
|
||||
btdev->rx_skb = h4_recv_buf(hu->hdev, btdev->rx_skb, data, count,
|
||||
nokia_recv_pkts, ARRAY_SIZE(nokia_recv_pkts));
|
||||
if (IS_ERR(btdev->rx_skb)) {
|
||||
err = PTR_ERR(btdev->rx_skb);
|
||||
dev_err(dev, "Frame reassembly failed (%d)", err);
|
||||
btdev->rx_skb = NULL;
|
||||
return err;
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static struct sk_buff *nokia_dequeue(struct hci_uart *hu)
|
||||
{
|
||||
struct nokia_bt_dev *btdev = hu->priv;
|
||||
struct device *dev = &btdev->serdev->dev;
|
||||
struct sk_buff *result = skb_dequeue(&btdev->txq);
|
||||
|
||||
if (!btdev->initialized)
|
||||
return result;
|
||||
|
||||
if (btdev->tx_enabled == !!result)
|
||||
return result;
|
||||
|
||||
if (result) {
|
||||
pm_runtime_get_sync(dev);
|
||||
gpiod_set_value_cansleep(btdev->wakeup_bt, 1);
|
||||
} else {
|
||||
serdev_device_wait_until_sent(btdev->serdev, 0);
|
||||
gpiod_set_value_cansleep(btdev->wakeup_bt, 0);
|
||||
pm_runtime_put(dev);
|
||||
}
|
||||
|
||||
btdev->tx_enabled = !!result;
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
static const struct hci_uart_proto nokia_proto = {
|
||||
.id = HCI_UART_NOKIA,
|
||||
.name = "Nokia",
|
||||
.open = nokia_open,
|
||||
.close = nokia_close,
|
||||
.recv = nokia_recv,
|
||||
.enqueue = nokia_enqueue,
|
||||
.dequeue = nokia_dequeue,
|
||||
.flush = nokia_flush,
|
||||
.setup = nokia_setup,
|
||||
.manufacturer = 1,
|
||||
};
|
||||
|
||||
static int nokia_bluetooth_serdev_probe(struct serdev_device *serdev)
|
||||
{
|
||||
struct device *dev = &serdev->dev;
|
||||
struct nokia_bt_dev *btdev;
|
||||
struct clk *sysclk;
|
||||
int err = 0;
|
||||
|
||||
btdev = devm_kzalloc(dev, sizeof(*btdev), GFP_KERNEL);
|
||||
if (!btdev)
|
||||
return -ENOMEM;
|
||||
|
||||
btdev->hu.serdev = btdev->serdev = serdev;
|
||||
serdev_device_set_drvdata(serdev, btdev);
|
||||
|
||||
btdev->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(btdev->reset)) {
|
||||
err = PTR_ERR(btdev->reset);
|
||||
dev_err(dev, "could not get reset gpio: %d", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
btdev->wakeup_host = devm_gpiod_get(dev, "host-wakeup", GPIOD_IN);
|
||||
if (IS_ERR(btdev->wakeup_host)) {
|
||||
err = PTR_ERR(btdev->wakeup_host);
|
||||
dev_err(dev, "could not get host wakeup gpio: %d", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
btdev->wake_irq = gpiod_to_irq(btdev->wakeup_host);
|
||||
|
||||
err = devm_request_threaded_irq(dev, btdev->wake_irq, NULL,
|
||||
wakeup_handler,
|
||||
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
||||
"wakeup", btdev);
|
||||
if (err) {
|
||||
dev_err(dev, "could request wakeup irq: %d", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
btdev->wakeup_bt = devm_gpiod_get(dev, "bluetooth-wakeup",
|
||||
GPIOD_OUT_LOW);
|
||||
if (IS_ERR(btdev->wakeup_bt)) {
|
||||
err = PTR_ERR(btdev->wakeup_bt);
|
||||
dev_err(dev, "could not get BT wakeup gpio: %d", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
sysclk = devm_clk_get(dev, "sysclk");
|
||||
if (IS_ERR(sysclk)) {
|
||||
err = PTR_ERR(sysclk);
|
||||
dev_err(dev, "could not get sysclk: %d", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
clk_prepare_enable(sysclk);
|
||||
btdev->sysclk_speed = clk_get_rate(sysclk);
|
||||
clk_disable_unprepare(sysclk);
|
||||
|
||||
skb_queue_head_init(&btdev->txq);
|
||||
|
||||
btdev->hu.priv = btdev;
|
||||
btdev->hu.alignment = 2; /* Nokia H4+ is word aligned */
|
||||
|
||||
err = hci_uart_register_device(&btdev->hu, &nokia_proto);
|
||||
if (err) {
|
||||
dev_err(dev, "could not register bluetooth uart: %d", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void nokia_bluetooth_serdev_remove(struct serdev_device *serdev)
|
||||
{
|
||||
struct nokia_bt_dev *btdev = serdev_device_get_drvdata(serdev);
|
||||
struct hci_uart *hu = &btdev->hu;
|
||||
struct hci_dev *hdev = hu->hdev;
|
||||
|
||||
cancel_work_sync(&hu->write_work);
|
||||
|
||||
hci_unregister_dev(hdev);
|
||||
hci_free_dev(hdev);
|
||||
hu->proto->close(hu);
|
||||
|
||||
pm_runtime_disable(&btdev->serdev->dev);
|
||||
}
|
||||
|
||||
static int nokia_bluetooth_runtime_suspend(struct device *dev)
|
||||
{
|
||||
struct serdev_device *serdev = to_serdev_device(dev);
|
||||
|
||||
nokia_flow_control(serdev, false);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nokia_bluetooth_runtime_resume(struct device *dev)
|
||||
{
|
||||
struct serdev_device *serdev = to_serdev_device(dev);
|
||||
|
||||
nokia_flow_control(serdev, true);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct dev_pm_ops nokia_bluetooth_pm_ops = {
|
||||
SET_RUNTIME_PM_OPS(nokia_bluetooth_runtime_suspend,
|
||||
nokia_bluetooth_runtime_resume,
|
||||
NULL)
|
||||
};
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static const struct of_device_id nokia_bluetooth_of_match[] = {
|
||||
{ .compatible = "nokia,h4p-bluetooth", },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, nokia_bluetooth_of_match);
|
||||
#endif
|
||||
|
||||
static struct serdev_device_driver nokia_bluetooth_serdev_driver = {
|
||||
.probe = nokia_bluetooth_serdev_probe,
|
||||
.remove = nokia_bluetooth_serdev_remove,
|
||||
.driver = {
|
||||
.name = "nokia-bluetooth",
|
||||
.pm = &nokia_bluetooth_pm_ops,
|
||||
.of_match_table = of_match_ptr(nokia_bluetooth_of_match),
|
||||
},
|
||||
};
|
||||
|
||||
module_serdev_device_driver(nokia_bluetooth_serdev_driver);
|
||||
Loading…
Reference in New Issue
Block a user